Running a i4770 on a DH87RL board, with latest bios (320)
Using an PWM cooler from Noctua NH-12S (which received positive reviews from a number of magazines).
My problem: the mainboard doesn't seem to control the fan(s) properly.
When I use factory settings (setting "Quite(0) in cooling assistant) the CPU fan starts with about 300rpm and stays there. Case fase are running with 600-700 rpm.
When I put the CPU under stress, its temperature goes up to 80 C without the fans ever speeding up. Then the thermal throttle sets in.
With any different setting in cooling assistant (e.g. "Cooling Assistant(1)"), the fans start with full speed (1500rpm for CPU, >1000rpm for front and rear), even when the machine is idle (or is in the BIOS screen).
Now the CPU stays below 60C even under full load, but it's somewhat loud and I really would like to have proper thermal management.
RPM and temperature sensors seem to work correctly.
I noticed that the BIOS cooling assistant graphics seems inconsistent at times. If you adjust the temperature curves and switch to another tab and then back, the curves are not remembered correctly.
Is this a known BIOS issue?
